The car mounted the kerb near a busy crossroads in Chigasaki city, southwest of the capital Tokyo, hitting four pedestrians, a local police spokesman said.
"One female victim was later confirmed dead and three others -- two women and one man -- were injured," he added.
The spokesman confirmed the female driver was 90 years old. Police were still investigating the cause of the accident.
Local media said the driver was also slightly injured.
Drivers over 65 were responsible for 965 deadly accidents in Japan -- more than a quarter of the total -- in 2016, according to the National Police Agency.
Most accidents caused by elderly drivers resulted from them mixing up the accelerator and the brake or losing control of the steering wheel.
(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)
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